"As long as Miss Beelzebub likes it," the story describes the former angels who fell to heaven after the Celestial War, working hard in the demon world as demons. And these hard-working demons actually have an unknown side... Mullin, who works in the Pantheon, is a close attendant of Beelzebub, the ruthless monarch of the demon world, but he did not expect the true face of the head of the demons who is both intellectual and beautiful. It was so shocking that he was distressed every day because of